node16 reached the end of life

- Announcements:
  - https://github.blog/changelog/2024-09-25-end-of-life-for-actions-node16/
  - https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/
- `node16` runner is already run with node v20 actually: https://github.com/actions/runner/blob/59ec9b4139df9931ac67b7aa5f215bd3f4a8507f/src/Runner.Worker/Handlers/HandlerFactory.cs#L60-L65

action_metadata_test.go

@@ -228,7 +228,7 @@ func TestLocalActionsParsingSkipped(t *testing.T) {
 		{
 			what: "not a local action",
 			proj: &Project{"", nil},
-			spec: "actions/checkout@v3",
+			spec: "actions/checkout@v4",
 		},
 		{
 			what: "action does not exist (#25, #40)",

docs/checks.md

@@ -512,7 +512,7 @@ jobs:
       # ERROR: The step is not run yet at this point
       - run: echo ${{ steps.cache.outputs.cache-hit }}
       # actions/cache sets cache-hit output
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         id: cache
         with:
           key: ${{ hashFiles('**/*.lock') }}
@@ -1755,7 +1755,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           keys: |
             ${{ hashFiles('**/*.lock') }}
@@ -1767,28 +1767,28 @@ jobs:
 Output:
 
 ```
-test.yaml:7:15: missing input "key" which is required by action "actions/cache@v3". all required inputs are "key", "path" [action]
+test.yaml:7:15: missing input "key" which is required by action "actions/cache@v4". all required inputs are "key", "path" [action]
   |
-7 |       - uses: actions/cache@v3
+7 |       - uses: actions/cache@v4
   |               ^~~~~~~~~~~~~~~~
-test.yaml:9:11: input "keys" is not defined in action "actions/cache@v3". available inputs are "key", "path", "restore-keys", "upload-chunk-size" [action]
+test.yaml:9:11: input "keys" is not defined in action "actions/cache@v4". available inputs are "key", "path", "restore-keys", "upload-chunk-size" [action]
   |
 9 |           keys: |
   |           ^~~~~
 ```
 
 [Playground](https://rhysd.github.io/actionlint#eJyFj0EKwjAQRfc9xV8I1UJbcJmVK+8xDYOpqUlwEkVq725apYgbV8PMe/Dne6cQkpiiOPtOVAFEljhP4Jqc1D4LqUsupnqgmS1IIgd5W0CNJCwKpGPvnbSatOHDbf/BwL2PRq0bYPmR9efXBdiMIwyJOfYDy7asqrZqBq9tucM0/TWXyF81UI5F0wbSlk4s67u5mMKFLL8A+h9EEw==)
 
-actionlint checks inputs of many popular actions such as `actions/checkout@v3`. It checks
+actionlint checks inputs of many popular actions such as `actions/checkout@v4`. It checks
 
 - some input is required by the action but it is not set at `with:`
 - input set at `with:` is not defined in the action (this commonly occurs by a typo)
 
 this is done by checking `with:` section items with a small database collected at building `actionlint` binary. actionlint
 can check popular actions without fetching any `action.yml` of the actions from the remote so that it can run efficiently.
 
-Note that it only supports the case of specifying major versions like `actions/checkout@v3`. Fixing version of action like
-`actions/checkout@v3.0.2` and using the HEAD of action like `actions/checkout@main` are not supported for now.
+Note that it only supports the case of specifying major versions like `actions/checkout@v4`. Fixing version of action like
+`actions/checkout@v4.0.1` and using the HEAD of action like `actions/checkout@main` are not supported for now.
 
 So far, actionlint supports more than 100 popular actions The data set is embedded at [`popular_actions.go`](../popular_actions.go)
 and were automatically collected by [a script][generate-popular-actions]. If you want more checks for other actions, please
@@ -1806,27 +1806,27 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      # ERROR: actions/checkout@v2 is using the outdated runner 'node12'
-      - uses: actions/checkout@v2
+      # ERROR: actions/checkout@v3 is using the outdated runner 'node16'
+      - uses: actions/checkout@v3
 ```
 
 Output:
 
 ```
-test.yaml:8:15: the runner of "actions/checkout@v2" action is too old to run on GitHub Actions. update the action's version to fix this issue [action]
+test.yaml:8:15: the runner of "actions/checkout@v3" action is too old to run on GitHub Actions. update the action's version to fix this issue [action]
   |
-8 |       - uses: actions/checkout@v2
+8 |       - uses: actions/checkout@v3
   |               ^~~~~~~~~~~~~~~~~~~
 ```
 
 [Playground](https://rhysd.github.io/actionlint#eJwlyjkOwCAMRNGeU8wFUKSUVLkKICSyyEYZO+fPVv3ifZWE4ewhbFqYAmCN9hY4XRj1Gby4mMcjv/YRrQ3+FxDhbEzI1VYVTrW3uqvbcs03dIgdzQ==)
 
 In addition to the checks for inputs of actions described in [the previous section](#check-popular-action-inputs), actionlint
 reports an error when a popular action is 'outdated'. An action is outdated when the runner used by the action is no longer
-supported by GitHub Actions runtime. For example, `node12` is no longer available so any actions can use `node12` runner.
+supported by GitHub Actions runtime. For example, `node12` is no longer available so any actions can not use `node12` runner.
 
-Note that this check doesn't report that the action version is up-to-date. For example, even if you use `actions/checkout@v3` and
-newer version `actions/checkout@v4` is available, actionlint reports no error as long as `actions/checkout@v3` is not outdated.
+Note that this check doesn't report that the action version is up-to-date. For example, even if you use `actions/checkout@v4` and
+newer version `actions/checkout@v5` is available, actionlint reports no error as long as `actions/checkout@v4` is not outdated.
 If you want to keep actions used by your workflows up-to-date, consider to use [Dependabot][dependabot-doc].
 
 <a name="check-shell-names"></a>

example_your_own_rule_test.go

@@ -58,7 +58,7 @@ func ExampleLinter_yourOwnRule() {
 	//
 	// testdata/examples/main.yaml:14:9: every step must have its name [step-name]
 	//    |
-	// 14 |       - uses: actions/checkout@v3
+	// 14 |       - uses: actions/checkout@v4
 	//    |         ^~~~~
 	fmt.Println(len(errs), "lint errors found by actionlint")
 	// Output: 1 lint errors found by actionlint